Derivative Financial Instruments (Contractual and Weighted-Average Interest Rates, Which Include the Effects of Hedges Related to Financial Instruments) (Details) (Long-term debt)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Long-term debt
Derivative [Line Items]
Contractual Rates	3.39%	3.77%
Rate Including Impact of Hedges	2.60%	3.03%